Television – Basic receiver with additional function – For display of additional information
Reexamination Certificate
1998-06-12
2001-10-09
Harvey, David E. (Department: 2614)
Television
Basic receiver with additional function
For display of additional information
C348S564000, C348S563000, C348S634000
Reexamination Certificate
active
06300981
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image data storage/display apparatus and method for a television receiver having a viewer's screen display function.
2. Description of the Related Art
In general, a television receiver (TV) receives a multichannel radio-frequency (RF) signal transmitted from a broadcasting station, and performs video/audio signal processing to output an image signal to a cathode ray tube (CRT) and to output an audio signal to a loudspeaker. In a TV having a still mode function, input video signals are sequentially stored in a memory of a predetermined size, and if a still mode is set, the stored video signal is repeatedly outputted to display a still image on the CRT screen.
As illustrated in
FIG. 1
, a TV having a still mode function includes a video memory
104
for storing video signals Vp inputted from the broadcasting station or outside, a switch
101
for selecting the video signal Vp in a normal mode and selecting an output signal Vm of the video memory
104
in a still mode, a video processing section
102
for processing an output signal Vs of the switch
101
and outputting the processed video signal to a CRT
103
, an audio processing section
107
for processing an audio signal Ap inputted from the broadcasting station or outside and outputting the processed audio signal Ap to a loudspeaker
108
, and a microcomputer
106
for discriminating whether the present mode is a normal mode or a still mode by checking an output signal from a key input section
105
, and outputting a control signal Cs to the switch
101
according to the result of discrimination. The microcomputer
106
also outputs a control signal Cv for controlling contrast, sharpness, tint, etc. of the CRT
103
to the video processing section
102
; a control signal Cm for reading/writing image data from/in the video memory
104
; and a control signal Ca for controlling volume to the audio processing section
107
.
The video processing section
102
may comprise a video matrix circuit.
In
FIG. 1
, the reference numberal
109
denoted a video input terminal through which a video signal from the broadcasting station or from external audio-video appliances such as video cassette recorders and video cameras, and the reference number
110
denotes an audio input terminal.
The operation of the conventional TV as constituted above will now be explained.
The microcomputer
106
checks an output signal of the key input section
105
to discriminate whether the current mode is a normal mode or a still mode.
If the microcomputer
106
discriminates that the current mode is the normal mode, it outputs the control signal Cs to the switch
101
, and the switch
101
connects the video input terminal
109
to the video processing section
102
. The video processing section
102
processes the video signal Vp inputted from the video input terminal
109
to display the video signal on the screen of the CRT
103
. At this time, the contrast, sharpness, or tint of the CRT
103
is controlled according to the control signal Cv from the microcomputer
106
.
While displaying the video signal Vp inputted from the video input terminal
109
on the screen of the CRT
103
as described above, the video memory
104
sequentially stores therein the video signal Vp according to the control signal Cm from the microcomputer
106
.
Meanwhile, the audio signal Ap inputted through the audio input terminal
110
, which corresponds to the video signal displayed on the screen of the CRT
103
, is processed by the audio processing section
107
, and outputted to the loudspeaker
108
. At this time, the volume is controlled according to the control signal Ca from the microcomputer
106
.
During the above-described operation, if a user pushes a still button in the key input section
105
to view the image of a certain scene displayed on the CRT screen, the microcomputer
106
discriminates the still mode by checking the output signal from the key input section
105
, and outputs the control signal Ca to the switch
101
. Accordingly, the switch
101
connects the output terminal of the video memory
104
to the input terminal of the video processing section
102
.
The microcomputer
106
also outputs the control signal Cm to the video memory
104
, so that the video signal Vm stored in the video memory
104
is sequentially outputted to the video processing section
102
.
As a consequence, the video processing section
102
processes the video signal Vm from the video memory
104
, and displays the processed video signal as a still image on the screen of the CRT
103
.
If the user selects a still release key in the key input section
105
, the switch
101
connects the video input terminal
109
to the video processing section
102
according to the control signal Cs from the mcirocomputer
106
. The video memory
104
is in a write mode for storing therein the video signal Vp from the video input terminal
109
according to the control signal Cm from the microcomputer
106
.
As a result, the normal mode is resumed to display the image on the screen of the CRT
103
, and the audio signal corresponding to the displayed image is outputted to the loudspeaker
108
.
However, such a conventional art has a problem that the image data of the current scene may be lost if the still mode function is released or another still image is displayed on the screen. Further, since the still image is displayed by the viewer's key manipulation, the viewer may feel bored if no video signal is transmitted from the TV broadcasting station, or if the channel or the input terminal is changed.
SUMMARY OF THE INVENTION
It is an object of the present invention to solve the problems involved in the related art, and to provide an image data storage/display apparatus and method for a television receiver having a viewer's screen display function whereby a desired image is stored, and the stored image is automatically displayed on the screen when no video signal is inputted or when the channel or the input terminal is changed, so that the viewer may not be bored.
In one aspect of the present invention, there is provided an image data storage/display apparatus for a television receiver having a viewer's screen display function, comprising a video input section for inputting a video signal, a first switch for being switched to a video input terminal or the video input section, a data storage section for temporarily storing the video signal inputted from the first switch in a first memory, outputting the video signal stored in the first memory to display the video signal as an image when a still mode is set, and storing the video signal in a second memory when a signal for storing the displayed video signal is inputted, a second switch for switching the video signal inputted from the video input terminal or an output signal of the data storage section, a video processing section for processing the video signal from the second switch to output a processed signal to the CRT, a video detecting section for detecting whether or not the video signal is inputted through the video input terminal, and a microcomputer for controlling the data storage section so that the viewer can store and display an image on the screen when a corresponding key signal is inputted or when it is detected by the video detecting section that no video signal is inputted through the video input terminal.
The data storage section may comprise a digital-to-analog (A/D conversation section for converting the video signal from the first switch into a digital signal, a first memory for temporarily storing an output signal of the A/D conversion means, a second memory for storing video data for the viewer's screen, a digital-to-analog (D/A) conversion section for converting an output signal of the first memory into an analog signal, and outputting the analog signal to the second switch, and a memory control section for controlling the data input/output through the A/D conversion section, D/A conversion section, and
Jeoung Jin Kuk
Jung Gwon Sool
Kim Joo Won
Lee Jae Kyung
Shim Bong Chun
Harvey David E.
LG Electronics Inc.
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